GM EnerTech has been Mattituck ‘s go to choice for HVAC and plumbing excellence. With transparent service calls, rapid emergency response, and a track record trusted by 263 local families, we deliver the reliable, honest service your home deserves.
Same day service across Long Island and nearby areas no waiting days for a fix.
Every technician is certified, background checked, and fully insured.
You approve the price before we start no surprise charges, ever.
Years Serving Nassau & Suffolk County
While Mattituck remains our primary focus, our 5 mile service radius ensures comprehensive HVAC coverage for the entire community and neighboring areas. Whether you need routine maintenance, emergency repairs, or complete system replacement, GM EnerTech delivers the expertise and reliability Glen Cove families deserve.
No hidden fees. Exact quotes provided before work begins.
| Service | Description | Call us |
|---|---|---|
| Service Call/Diagnostic | Complete inspection & cleaning | + (516) 774-1739 |
| Faucet Repair | Minor to major repairs | + (516) 774-1739 |
| Toilet Repair | Complete system | + (516) 774-1739 |
| Drain Cleaning | Inspection & safety check | + (516) 774-1739 |
| Water Heater Repair | High-efficiency gas furnace | + (516) 774-1739 |
| Tank Water Heater Installation | New high-efficiency boiler | + (516) 774-1739 |
| Service | Description | Call us |
|---|---|---|
| Furnace Tune Up | Complete inspection, cleaning, and safety check | + (516) 774-1739 |
| Furnace Repair (Minor) | Thermostat issues, pilot light, minor electrical | + (516) 774-1739 |
| Furnace Repair (Major) | Heat exchanger, blower motor, control board replacement | + (516) 774-1739 |
| Gas Furnace Installation | New high efficiency gas furnace installation | + (516) 774-1739 |
| Oil to Gas Conversion | Complete conversion including new equipment and gas line | + (516) 774-1739 |
| Boiler Service | Annual boiler maintenance and inspection | + (516) 774-1739 |
| Boiler Replacement | New high efficiency boiler installation | + (516) 774-1739 |
| Service | Description | Call us |
|---|---|---|
| AC Tune Up | Complete system inspection, cleaning, and adjustment | + (516) 774-1739 |
| AC Repair (Minor) | Capacitor replacement, relay switches, minor electrical | + (516) 774-1739 |
| AC Repair (Major) | Compressor repair, evaporator coil issues, refrigerant leaks | + (516) 774-1739 |
| Central AC Installation | Complete system installation including equipment and labor | + (516) 774-1739 |
| Ductless Mini-Split Installation | Single zone ductless system installation | + (516) 774-1739 |
| AC Replacement | Remove old system and install new central AC | + (516) 774-1739 |
High bills often result from: poor insulation, air leaks, inefficient equipment, incorrect thermostat settings, or duct leaks (losing 20-30% of conditioned air). Port Washington’s climate makes systems work harder. An energy audit identifies savings. New high-efficiency systems can reduce costs by 20-40%.
If pipes freeze: shut off the main water valve, open faucets to relieve pressure, and call us immediately. Never use open flames. Common freeze points include pipes in unheated basements and crawl spaces.
Use a breathable cover or just plywood on top to prevent debris accumulation. Never fully wrap the unit – this traps moisture and causes rust, especially with salt air. Units are designed for weather, but coastal properties benefit from monthly fresh water rinses.
Several factors can cause this issue: dirty air filters (most common), low refrigerant levels, frozen evaporator coils, or a malfunctioning compressor. In Glen Cove’s humid climate, frozen coils are especially common. Turn off your system for 2-3 hours to let it thaw, check and replace your filter, then restart. If the problem persists, professional service is needed.
Call immediately for: no heat below 40°F, no cooling above 85°F, gas odors, major water leaks, sewage backups, no hot water, electrical burning smells, or frozen pipes. Our 24/7 service ensures rapid response in Glen Cove. Emergency service adds $75. For non-emergencies, schedule next-day service to save on fees.
